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Finding the Fourth Proportional to 292,691.20, 403,912.80 and 158,555.20

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Solution

The fourth proportional to 292,691.20, 403,912.80 and 158,555.20 is: 218,805.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,691.20 : 403,912.80 = 158,555.20 : x
  2. Step 2: Convert to fraction form
    292,691.20/403,912.80 = 158,555.20/x
  3. Step 3: Cross multiply
    292,691.20x = 403,912.80 × 158,555.20
  4. Step 4: Simplify right side
    292,691.20x = 64,042,474,786.56
  5. Step 5: Solve for x
    x = 64,042,474,786.56/292,691.20
  6. Step 6: Final answer
    x = 218,805.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.